package com.leenmvc.core.utils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class PingUtil {

//    public static boolean ping(String ipAddress) throws Exception {
//        int  timeOut =  3000 ;  //超时应该在3钞以上
//        // 当返回值是true时，说明host是可用的，false则不可。
//        boolean status = InetAddress.getByName(ipAddress).isReachable(timeOut);
//        return status;
//    }
//
//    public static void ping02(String ipAddress) throws Exception {
//        String line = null;
//        try {
//            Process pro = Runtime.getRuntime().exec("ping " + ipAddress);
//            BufferedReader buf = new BufferedReader(new InputStreamReader(
//                    pro.getInputStream()));
//            while ((line = buf.readLine()) != null)
//                System.out.println(line);
//        } catch (Exception ex) {
//            System.out.println(ex.getMessage());
//        }
//    }

    public static boolean ping(String ipAddress, int pingTimes, int timeOut) {
        String osName = System.getProperty("os.name");//获取操作系统类型
        String pingCommand = "";
        if(osName.toLowerCase().contains("linux")){
            pingCommand = "ping -c "+pingTimes+" -i 1 "+ipAddress;
        }else {
            pingCommand = "ping " + ipAddress + " -n " + pingTimes + " -w " + 1000 * timeOut;
        }
        BufferedReader in = null;
        Runtime r = Runtime.getRuntime();
        // 将要执行的ping命令,此命令是windows格式的命令
        try {
            // 执行命令并获取输出
            System.out.println(pingCommand);
            Process p = r.exec(pingCommand);
            if (p == null) {
                return false;
            }
            in = new BufferedReader(new InputStreamReader(p.getInputStream(), Charset.forName("GBK")));
            // 逐行检查输出,计算类似出现=23ms TTL=62字样的次数
            int connectedCount = 0;
            String line = null;
            while ((line = in.readLine()) != null) {
                connectedCount += getCheckResult(line,osName);
            }
            // 如果出现类似=23ms TTL=62这样的字样,出现的次数=测试次数则返回真
            return connectedCount == pingTimes;
        } catch (Exception ex) {
            ex.printStackTrace();
            return false;
        } finally {
            try {
                in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    //若line含有=18ms TTL=16字样,说明已经ping通,返回1,否則返回0.
    //64 bytes from 192.168.0.1: icmp_seq=0 ttl=253 time=1.172 ms
    private static int getCheckResult(String line,String osName) {
        System.out.println(line);
        Pattern pattern = null;
        if(osName.toLowerCase().contains("linux")){
//            (\d+\s+ms)
            pattern = Pattern.compile("(ttl=\\d+)(\\s+)time=(\\d+)\\.(\\d+)(\\s+)ms",Pattern.CASE_INSENSITIVE);
        }else{
            pattern = Pattern.compile("(\\d+ms)(\\s+)(ttl=\\d+)",Pattern.CASE_INSENSITIVE);
        }
        Matcher matcher = pattern.matcher(line);
        while (matcher.find()) {
            System.out.println(1);
            return 1;
        }
        return 0;
    }
    public static void main(String[] args) throws Exception {
//        String ipAddress = "192.168.3.222";
//        System.out.println(ping(ipAddress, 5, 5000));
        String s = "64 bytes from 192.168.0.1: icmp_seq=1 ttl=254 time=1.02 ms";
        int linux = getCheckResult(s, "linux");

    }
}
